It's Shabbat (the Sabbath). You have your stove on covered by a blech (a metal plate that covers the burners and the controls, and on which food is placed before Shabbat to keep it warm).
Late Friday night, several hours after Shabbat started, police order an immediate evacuation of your neighborhood due to a pending natural disaster like a hurricane, or for some other urgent public safety need.
You can ride in provided buses to evacuate or drive your own car if that is not possible, and for the purposes of this post we will consider either option completely permissable (as they both are in real life, as well).
What do you do about the stove and blech if no non-Jew is around to turn off the stove or if there is no time to ask a non-Jew to do it?
A. Leave it on because it only poses a danger to property.
B. Leave it on because Shabbat cannot be violated to turn it off.
C. Turn it off (with a shinui, an unusual way of doing something, if possible) because fires pose a danger to lives of the firefighters who fight them, and to others if the fire is allowed to spread.
D. I don't know so I would ask a rabbi what to do, even if I had to go looking for one.
E. Despite the fact that no non-Jews appear to be close by, I would spend time looking for one to turn off the stove, even if it meant risking missing the evacuation time limit or causing a non-Jew to do the same.
Answer: No matter what any rabbi might tell you, the answer is C.
Answers D and E are absolutely forbidden without question. Answers A and B are the standard answers given by Orthodox and haredi rabbis, largely because most of them have no idea how the world works, and they answer questions like this with caricatured answers, as if they were living in a mythical, small, all Jewish Polish shtetl 250 years ago.